Synthesis of Rare-Earth-Based Metallic Electride Nanoparticles and Their Catalytic Applications to Selective Hydrogenation and Ammonia Synthesis
Synthesis of Rare-Earth-Based Metallic Electride Nanoparticles and Their Catalytic Applications to Selective Hydrogenation and Ammonia Synthesis
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DOI：
10.1021/acscatal.8b03743
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发表时间：
2018-12-01
期刊：
影响因子：
12.9
通讯作者：
Hosono, Hideo
中科院分区：
文献类型：
--
作者：
Lu, Yangfan;Li, Jiang;Hosono, Hideo
报道了用Ar/H-2弧蒸发法成功地合成了La-Cu0.67Si1.33和Y5Si3电子纳米粒子。得到的颗粒直径为10-50 nm，比表面积比手工研磨样品提高了几个数量级。对硝基苯(LaCu0.67Si1.33)和氨合成(Y5Si3)的催化性能分别提高了60倍和3倍。不同体系之间催化活性增强的显著差异可以归因于活性中心的几何结构。这些结果表明，Ar/H-2电弧蒸发技术为制备具有增强催化活性的稀土基电纳米粒子提供了广泛的通用性。
We report the successful synthesis of La-Cu0.67Si1.33 and Y5Si3 electride nanoparticles (NPs) using the Ar/H-2 arc evaporation technique. The obtained particle sizes are 10-50 nm in diameter, and their surface areas are enhanced by orders of magnitude compared with hand-milled samples. Their catalytic performances were indeed improved by a factor of 60 for the hydrogenation of nitrobenzene (LaCu0.67Si1.33) and 3 for ammonia synthesis (Ru-loaded Y5Si3). This marked difference in the enhancement of catalytic activities between each system can be attributed to the geometric structure of active sites. These results show that the Ar/H-2 arc evaporation technique offers wide versatility for the preparation of rare-earth-based electride NPs with enhanced catalytic activities.